Abstract: A videophone apparatus includes a communication interface for communicating with a system server and a peer; at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code cause the videophone apparatus to connect the videophone apparatus via a first wireless connection to the system server; transmit authentication information from the videophone apparatus to the system server via the first wireless connection for initiating account generation for at least one video call service; and receive client information from the system server. The videophone apparatus further determines a client application based on the received client information; establishes a peer-to-peer connection between the videophone apparatus and the peer over a second wireless connection; and triggers a video call service over the peer-to-peer connection utilizing the determined client application and the account generated by the system server.

Abstract: A method for tracking an active subject in a video call service includes establishing a peer-to-peer connection between a videophone input apparatus and a peer over a wireless connection; receiving information of a first resolution display of an A/V output apparatus of the peer; and generating a local video stream in the videophone apparatus based on a video signal provided by a second resolution camera of the videophone apparatus, the second resolution being greater than the first resolution.